Worried baby might show signs of autism - overthinker mum

Im a first time mum and My baby is only 3 months old but for some reason everyday im always worried if he’s showing signs of autism. Altho he’s just being a baby and growing well, hitting some milestones. I can’t help but to worry. Im an overthinker and always over worried over the littlest stuff, when end up it’s nothing and over stressing myself (‘: Pls tell me im not the only one like this ☹️